Do you understand the downside of large blocks?

Do you understand that the block limit was set fourteen years ago, and that bandwidth and storage have increased exponentially since then?

It was also introduced as a temporary spam measure.

So right, but the issue is that block size increases only get you a linear increase in transaction rates which doesn't really address the problem (would 50 t/s somehow resolve any blockchain congestion?). So you make your currency less secure, risk chain splits but haven't even really solved any problems

If the hardware is improving exponentially, then increasing the block size on the same curve is also an exponential improvement.

Layer 2 is helpful but does not entirely remove the need for space on chain. In LN for example, every channel opening and closing uses block space.

Nothing centralized about it and it's not a service. I can open a Lightning channel to my friend and make as many transactions as I want. Only the final difference is broadcasted to the Bitcoin blockchain. A similar method was originally suggested by Satoshi for scaling Bitcoin, so I don't know how it could be a "scam".